The disclosure relates to the technical field of aquaculture, and more particularly to a fish breeding device provided with a magnetizer and a method for accelerating normal propagation and growth speeds of fishes. The fish breeding device includes a box body, a controllable partition plate, an extraction pump, and the magnetizer; the controllable partition plate is arranged in the box body and used for dividing the inner space of the box body into a feeding area and a non-feeding area; the extraction pump is arranged on the controllable partition plate and used for exchanging the water body in the feeding area with the water body in the non-feeding area; the magnetizer is arranged on the outer wall of the box body corresponding to the feeding area, and used for magnetizing the water body of the feeding area. In the disclosure, fish eggs are further hatched by the magnetized water. An adjustable magnetic field is utilized to act on fishes in development so that the fishes normally propagate and grow without causing the problems of retarded embryo development, stagnation, deformity, and the like. Meanwhile, pollutants generated in a feeding process can be purified, the utilization rate of feed put in a breeding process is increased, intermittent magnetization is adopted, and the consumption of electric energy is reduced.

A hybridization method of Sinocyclocheilus grahami and carp, which comprises parent fish cultivation, artificial insemination, fish egg incubating and fry feeding, strictly controls environmental parameters and feed types of parent fish cultivation, simulates good living conditions for S. grahami and carp, is beneficial for wild S. grahami and carp to adapt to the artificial breeding environment quickly, realizes natural spermatogenesis and oviposition in artificial environment without using the oxytocin, and provides sperm and eggs both in quality and quantity for artificial hybridization. At the same time, the key parameters during incubation (including incubating water level, water temperature, water flow velocity, pH, dissolved oxygen and sterilization of fertilized eggs, etc.) are also defined to provide suitable environmental conditions for the successful incubation of fertilized eggs.

A hybridization method of Sinocyclocheilus grahami and carp, which comprises parent fish cultivation, artificial insemination, fish egg incubating and fry feeding, strictly controls environmental parameters and feed types of parent fish cultivation, simulates good living conditions for S. grahami and carp, is beneficial for wild S. grahami and carp to adapt to the artificial breeding environment quickly, realizes natural spermatogenesis and oviposition in artificial environment without using the oxytocin, and provides sperm and eggs both in quality and quantity for artificial hybridization. At the same time, the key parameters during incubation (including incubating water level, water temperature, water flow velocity, pH, dissolved oxygen and sterilization of fertilized eggs, etc.) are also defined to provide suitable environmental conditions for the successful incubation of fertilized eggs.

An energy efficient aquaculture system combining mixed-cell and raceway configurations. The system comprises a raceway tank, a raceway channel, a first water purification subsystem, and a second water purification subsystem. The system may include one or more of a hatching subsystem, a nursery subsystem, a feeding subsystem, a finishing subsystem, and a fish pumping system for transfer of fish between raceway tanks. A method of growing fish for commercial production using the aquaculture system is also provided.

An energy efficient aquaculture system combining mixed-cell and raceway configurations. The system comprises a raceway tank, a raceway channel, a first water purification subsystem, and a second water purification subsystem. The system may include one or more of a hatching subsystem, a nursery subsystem, a feeding subsystem, a finishing subsystem, and a fish pumping system for transfer of fish between raceway tanks. A method of growing fish for commercial production using the aquaculture system is also provided.

A process for harvesting fish eggs is provided, in particular fish eggs from Salmon. The process comprises rearing sexually immature salmon in an aquatic environment in stages during which at least the light exposure and time span is adjusted. The rearing includes at least a winter-summer period that comprises a winter life-cycle stage, within which the broodstock is exposed to light that simulates winter light exposure, and a subsequent summer life-cycle stage, within which the broodstock is exposed to light that simulates summer light exposure, wherein the total Accumulated Thermal Unit (ATU) during the winter-summer period is no more than 5000. The inventions also provides salmon eggs that are produced by the disclosed process.

A process for harvesting fish eggs is provided, in particular fish eggs from Salmon. The process comprises rearing sexually immature salmon in an aquatic environment in stages during which at least the light exposure and time span is adjusted. The rearing includes at least a winter-summer period that comprises a winter life-cycle stage, within which the broodstock is exposed to light that simulates winter light exposure, and a subsequent summer life-cycle stage, within which the broodstock is exposed to light that simulates summer light exposure, wherein the total Accumulated Thermal Unit (ATU) during the winter-summer period is no more than 5000. The inventions also provides salmon eggs that are produced by the disclosed process.

The present disclosure provides a method for artificial rearing of porcupine pufferfish fries in indoor cement ponds. The method includes the following steps: nursery pond preparation, ponding of newly hatched prelarvae, feeding strategies at fry rearing stages, water quality management during fry rearing, separate ponding of fries, and emergence of fries. Compared with the prior art, the method realizes large-scale production of artificial rearing of porcupine pufferfish fries through a strict control of the water quality and environmental conditions of a nursery pond, along with scientific and reasonable feeding and operation management based on biological characteristics and nutrient requirements of the porcupine pufferfish at different fry breeding stages.

The present disclosure provides a method for artificial rearing of porcupine pufferfish fries in indoor cement ponds. The method includes the following steps: nursery pond preparation, ponding of newly hatched prelarvae, feeding strategies at fry rearing stages, water quality management during fry rearing, separate ponding of fries, and emergence of fries. Compared with the prior art, the method realizes large-scale production of artificial rearing of porcupine pufferfish fries through a strict control of the water quality and environmental conditions of a nursery pond, along with scientific and reasonable feeding and operation management based on biological characteristics and nutrient requirements of the porcupine pufferfish at different fry breeding stages.

Fish embryos may be successfully vaccinated or therapeutically treated if the therapeutic agent is injected into the yolk sac. Therapeutic agents may be directly injected or released from microspheres and enter the circulation and tissues. Injection into the yolk sac, combined with the use of carriers, allows for a continued, controlled release of therapeutic agents and processing of antigens. Fish vaccination or therapeutic treatment, selecting fish embryos post fertilization at the one-cell to eyed egg stage of development, and injecting the yolk sac with carriers associated with an antigen(s) or therapeutic agent(s), may be fully automated.